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author | Jiantao Shan <shanjiantao@loongson.cn> | 2024-04-24 07:36:07 +0300 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-02 17:35:28 +0300 |
commit | 2e1059698076eb7369dd393d2d5d186dda038044 (patch) | |
tree | d2277f684719b9f48f8b9bc45daf01d8f981d4fb /arch/s390 | |
parent | de357db4afa8ba76b1bf7e05ab146a44a54d3bd0 (diff) | |
download | linux-2e1059698076eb7369dd393d2d5d186dda038044.tar.xz |
LoongArch: Fix access error when read fault on a write-only VMA
commit efb44ff64c95340b06331fc48634b99efc9dd77c upstream.
As with most architectures, allow handling of read faults in VMAs that
have VM_WRITE but without VM_READ (WRITE implies READ).
Otherwise, reading before writing a write-only memory will error while
reading after writing everything is fine.
BTW, move the VM_EXEC judgement before VM_READ/VM_WRITE to make logic a
little clearer.
Cc: stable@vger.kernel.org
Fixes: 09cfefb7fa70c3af01 ("LoongArch: Add memory management")
Signed-off-by: Jiantao Shan <shanjiantao@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/s390')
0 files changed, 0 insertions, 0 deletions